Styles.csv encoding utf-8-sig, webui-user.bat change to script directory

[w-e-w]

change styles.csv encoding from utf8 to utf-8-sig

this allows for better compatibility for some programs such as Excel reason provided in next comment

changing work directory to script directory for webui-user.bat

so that the script can be executed via terminal without changing the work directory first

otherwise when the script tries to call webui.bat it may not find the file

this should be safe to merge as the current has a built-in auto update system will stash the changes then restore it after pull so this change should not overwriting existing webui-user.bat

this should only affect new downloads

[w-e-w]

Reason for using utf-8-sig over utf8 for styles.csv

Currently the web UI allows users to save Styles and Styles_Name to styles.csv, and it allows the use of non-english characters, such as Chinese Japanese this is working without issue

but if the user were to open the styles.csv in an external software such as Excel the text will be displayed as garbled

screenshot below

this can be fixed by adding the BOM to the styles.csv

Backwards compatibility with existing styles.csv

No issue

utf-8-sig allows the read and writing of BOM and non-BOM files

conversely utf8 can only read non-BOM files trying to read a file with file with BOM will result in an error

No issue with writing existing non-BOM styles.csv withutf-8-sig, when writing to a existing non-BOM files, the file will be automatically converted to BOM

	read utf8	read utf-8-sig	write utf8	write utf-8-sig	Excel
utf-8 file	works	works	works	convert file to utf-8-bom	error
utf-8-bom file	error	works	untested	works	works

example with Excel opening a non-BOM and BOM csv file

opening same file but one, left non-bom (error), right bom (correct)

[AUTOMATIC1111]

webui-user.bat is not to be edited

[w-e-w]

understood, I opened a new pull request on a clean branch https://github.com/AUTOMATIC1111/stable-diffusion-webui/pull/3056#issue-1413117756